银河系卫星星系搜寻和物理性质研究进展  

Research Progress on the Searching of Satellite Galaxies of the Milky Way and Their Physical Properties

作　　者：潘治政 杨超[1,2] 房敏 郑宪忠[1,2] PAN Zhi-zheng;YANG Chao;FANG Min;ZHENG Xian-zhong(Department of Antarctic and Radio Astronomy,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210033,China;School of Astronomy and Space Sciences,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院紫金山天文台南极天文与射电天文研究部,南京210033 [2]中国科学技术大学天文与空间科学学院,合肥230026

出　　处：《天文学进展》2022年第3期315-332,共18页Progress In Astronomy

基　　金：国家自然科学基金(11773076,12073078,12173088);国家重点研发计划(2017YFA0402703);青海省重大科技专项(2019-ZJ-A10)。

摘　　要：近十几年来,银河系卫星星系搜寻取得了重要进展。截至2021年,已发现卫星星系60余个,并且该数目随着下一代图像巡天的开展还将继续增加。全面普查卫星星系族群不仅对准确刻画近邻宇宙结构具有重要意义,还能用来检验星系形成模型和暗物质性质。卫星星系作为星系族群的重要组成部分,对其物理性质的研究也是理解星系形成与演化不可或缺的一环。首先介绍了近十几年来卫星星系的搜寻进展,对卫星星系物理性质做了总结,最后展望下一代巡天对该领域带来的机遇。Significant advances in the searching of Milky Way satellite galaxies have been achieved in the past two decades,thanks to the large-area imaging surveys such as the SDSS and DES.Up to 2021,more than 60 Milky Way satellite galaxies are discovered,and this number is expected to increase with the advent of the next generation imaging surveys such as WFST and LSST.A complete census of Milky Way satellite galaxies is not only crucial for mapping the structure of the local Universe,but also puts observational constraints on galaxy formation models.Satellite galaxies are important constituents of the whole galaxy population,and the investigation of their physical properties is essential to understand the picture of galaxy formation and evolution.The processes on the searching of Milky Way satellites during the past two decades,the searching methods,and the studies on their physical properties are reviewed.It is now clear that the Milky Way satellite galaxies are mainly composed by old,metal poor stellar populations,and they follow the scaling relations extrapolated by the massive galaxies toward the low-mass regime.The potential of up-coming surveys on promoting the development of this domain is also discussed.

关 键 词：银河系 矮星系 图像巡天 

分 类 号：P152[天文地球—天文学] P156